Generac SG045 vs Origin Engines 4.3L
The Generac SG045 and Origin Engines 4.3L are both natural gas generator engines in a similar power class. The Origin Engines 4.3L is the higher-output unit (60 kVA vs 56 kVA). Displacement is 4.43 L versus 4.3 L. The table below compares their full specifications side by side.
| Specification | Generac SG045 | Origin Engines 4.3L |
|---|---|---|
| Headline rating | 56 kVA | 60 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 45 kWe | 48 kWe |
| Prime (60 Hz) | 41 kWe | — |
| Displacement | 4.43 L | 4.3 L |
| Configuration | L4 | V6 |
| Cylinders | 4 | 6 |
| Rated speed | 1,800 RPM | 1,800 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Stationary | U.S. EPA Stationary |
| Dry weight | — | — |
| Origin | United States | United States |
Choosing between Generac SG045 and Origin Engines 4.3L
Use this comparison as an engineering shortlist, then confirm the complete generator package against load profile, voltage, 50/60 Hz frequency, duty class, emissions rules, cooling margin, altitude, ambient temperature, enclosure design, controller features, and alternator sizing. The Origin Engines 4.3L has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.